Method of making heels



F. v. HART.

METHOD OF MAKING HEELS.

7 APPLICATION FILED OCT. 26- 1917. v 1,361,053, I Patented Dec. 7, 1920,

2 SHEETSSHEET 1.

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APPLICATION FILED-OCT. 26. 1917.

1 53 Patented Dec. 7, 1920.

2 SHEETSSHEET 2- UNITED STATES PATENT OFF-ICE.

FRED V. HART, 0F LYNN, MASSACHUSETTS, ASSIGNOR, IBY MESNE ASSIGNMENTS, TO

UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPO- RATION OF NEW'JERSEY.

METHOD OF MAKING HEELS.

Specification of Letters Patent. Patented Dec. '7, 1920.

Application filed October 26. 1917. Serial m). 198,609.

To all whom it may concern."

Be it known that I, FRED V. HART, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Methods of Making Heels; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a method of making heels and more particularly to'an improved method of preparing lifts for use in building wedge heels. The method is peculiarly adaptable to cutting lifts from prepared sheet heel-stock of which many different kinds are available, known under different trade names. For simplicity of nomenclature the heel-stock material will be referred to hereinafter by the term leatherboard, used in an inclusive sense.

The object of the present method is to so prepare the individual lifts from the sheetstock as to eliminate any was e of material, and to enable heels to be built more accurately.

The mode of carrying out the improved method to the best advantage willbe apparent from the following description of the steps to be followed, and from the appended claims, by which the essential features are pointed out. 1.

An understanding. of the improved method will be assisted by reference to the accompanying drawings in which:

Figure 1 is a side View of a heelblock built from lifts prepared by the new method ofcutting from sheetsto,ck,such lifts includingtwo'of wedge form; Fig, 2.is a breast end view .of the heel block shown in Fig. 1; Fig. 3 illustrates the kind of cut to be made in reducing a sheetof leatherboard to strips, which are later to be cut into even lifts of polygonal outline; Fig. 4 illustrates the kind of cut to be made insevering from the strips the even lifts which are to be used above the wedge lifts,'as shown in Fig. 1;

. Fig. 5 illustrates the kind of cut to be made in severing from the sheet the even strips which are to be used inobtaining, by cuts like those in Fig.- 4, the even lifts to beused below the wedge lifts, as shown in Fig. 1; Fig. 6 illustrates the kind of Cut to be made in reducing a sheet of leatherboard into strips from which Wedge lifts of polygonal outline are to be formed; Fig. 7 illustrates the step of cutting the leatherboard strips into two wedge strips; and Fig. 8 illustrates the kind of out to be made in severing the wedge strips into wedge lifts.

For ease of explanation, the following description will be confined to the production 7 of tetragonal lifts. Referring now to the accompanying drawings illustrating the preferred steps to be employed in carrying out the method it should first be pointed out that in Figs. 1 and 2 the dotted lines are intended to show the saving of stock, in favor of the improved method of cutting lifts, over that at present commercially used. In cutting lifts by dies, which is the present universal practice, the plane of the edge normal to the planes of the faces. Consequently when such lifts are piled in heel form, for a pitched heel the sides and back are steppedasindicated by the dotted lines in Figs. 1 and 2. This is true also of the wedge lifts in a wedge heel; and furthermore all even lifts on the heel seat side of the wedge lifts will project beyond the finished heel line at the breast, .as well as at the sides and back, as indicated by dotted lines p,

in Fig. 1. All of'this material projecting beyond the finished heel line is wasted by trimming. It also is difficult to register lifts cut by dies accurately. In consequence of an inaccurate'registry more material must be removed in the heel shaving operation .than is necessary, resulting in the production of a smaller heel than would otherwlse be obtained, from the same amount ofmate- "rial, were the registry accurate. It 1s obvious that if lifts can be. cut in such manner as to cause the contacting faces of ad oining lifts in the heel pile to coincide in outline the full value, or greatest possible size-of heel, may be obtained from the piled.

lifts and at the same time, since the entire heel surface will be smooth, less material need be removed in the heel shaving operation. As a corollary, more lifts can be obtainedfrom any given area of sheet'heel-.

stock. To these ends itis proposed to prepare the lifts in 'such manner that their edges will form a smooth lateral surface when assembled in a heel pile.. The simplest solution of the problem is to sever the liftsv heel, the sheet of leatherboard 10 is first cut into strips 12 by a knife 14 having a cutting edge which will produce a strip edge 16' at one sideof the cut, the planeof which'is normal to the, faces of the sheet,and a strip edge 18 at the Other side of the cut,"th'e plane of which is, oblique to the faces of the sheet.

'Each strip 12 is then divided into rectangular even lifts 20 by a second knife 22 the cutting edge of which is so-formed as to produce two oblique edges 24 at'the opposite sides of each lift. 'Having produced lifts, of different sizes in this manner, in building an un:

wedged, pitched heelthe edges 16, 18 and 24 I will be used for the breast, back, and sides of the'heel, respectively. Care having been taken to insure that the obliquity of the edges 18 and 24 shall equal the pitch of the back and sides of the heel it is desired to build,

it will be apparent that adjoining lifts in the heel pile will coincide in outline and they can, therefore, be registered accurately.

properly into a wedge heel when placed Such lifts as just described will build above thewedge lifts, as shown in Fig. 1, but they will not build properly below the wedge lifts because their right-angled breast edges will project beyond (the plane of the heel breast. l or producing the even lifts below or at the heel seat side of the wedge lifts, a sheetv 11 is severed in strips by a knife 26 (Fig. 5) which enters the face of the sheet at an angle and has a cutting edge which produces twooblique edges 28 and 30 on the .{strips 13.. The angle of the cut is such that I j the strip edge 30 isof less obliquity, with reference to the faces of the strips, than the strip edges 18, and the strip edge 28 is of sufficient obliquity toform a flat heel breast when rectangular even lifts 32 (Figs. 1 and 2) are cut tl'1erefrom,,by the step illustrated in Fig. 4, and assembled with the other even ;-lifts 20 andthe intermediate wedge lifts 34. Wlll be noted that a cross-section of the lifts 32, from breast to back, is in theform,

substantially, of a rhomboid.

In producing the wedge lifts 34, for use in awedge heel, a sheet of leatherboard 15 is severed into strips 36 by a knife 26 (Fig. 6)

, having a cutting stroke in a planeat an angle to the face of the sheet, as in cutting the strips for the even lifts 32 (see: Fig. 5) but i in this step care should be taken to produce,

as nearly as possible, strip edges 38 having an obliquity to the faces of the sheet equal to the, obliquity of the strip edges 18. .A

splitting knife is then used to split the strips 36 in two wedge strips 42, as indicated by the dotted lines'in Fig. 7. Inthe final V 7 substantially, of an oblique triangle.

It will beunderstood that a quantity 'of lifts of carying areas are produced from'the sheets by the operations just described and these are given to the heel builder who thereafter, by known methods, assembles them in a graded pile as shown in Fig; 1, insuch order as maybe desired for any given style of heel, placing theeven lifts 32 always at the heel seat side of the wedge lifts 34 and the even lifts 20 at the tread face side 'of said wedge; lifts; When this is done a rough heel, or heelblock, results, in whichthe lifts are inperfect registry and which has a vertical breast 44, a smooth pitched ba'ck46 (Fig. 1), and smooth oblique sides 48 (Fig. 2 heel form in a machine of the type illustrated and described in Letters Patent of the United" States to Erastus E. VVinkley No. 1,102,310,

This heel block may then be shaved to r dated July 7, 1914, it being obvious that only the minimum amount of material need be removedsince the lateral surface of the heel is already of the desired pitch, or slope;

with reference to the tread face. 7

The nature and scope of the inve'ntionhaving been indicated and the preferred mode of practising the method having been described, what is claimed as new, is I 1. The method of making heels which includes the steps of preparing a plurality of individual lifts of varying area, each with lateral surfaces of the sameobliquity as the desired pitch of thecorresponding surface of the heel; and then registering said liftson each other in a graded pile.

2.; The methodof making heels which includes the steps of producing aseries of in dividual lifts of varying area, each of which has a different area at each face but allof which have the area of one face equal to the area of one face of another lift of the series; and then assembling the lifts with their; faces of equal area adjoining.

3. The-method of making heelsv which includes the steps of producing a seriesof lifts comprising a plurality of even lifts and at least one wedge lift, all of varying area, all of said lifts having oblique edges at the back and sides and some of said even.

lifts having vertical edges at the breast ends;

. and then registering said lifts on each other in a graded pile with saideven lifts having vertical edges all at the tread face side cludes the steps of'producing a series of lifts comprising a plurality of even lifts and at least one wedge lift, all ofvarying area; all of said lifts having oblique edgesat the back and sides but some of said even lifts having vertical breast edges and one or more having oblique breast edges; and then registering said lifts in a gradedpile with sald even lifts having vertical and oblique breast edges at the tread face side and at the heel seat side, respectively, of

said wedge lift or lifts.

5. The method of making heels which in cludes the steps of producing a series of lifts comprising a plurality of even lifts and at least one wedge lift, all of varyin area, and all having lateral surfaces of suc obliquity to the lift faces as to provide a smooth, pitched lateral heel surface and a vertical heel breast when registered in a graded pile; and the registering said lifts in a graded pile.

6. The method of making heels which includes the steps of preparing a plurality of individual polygonal lifts of varying area each with lateral surfaces of the same obliquity as the desired pitch of the corresponding surface of the heel; registering said lifts on each other in a graded pile;

and shaving the lateral surface of said pile to heel form.

7. The method of making wedge lifts from sheet heel-stock which comprises dividing the sheet in strips by a series of spaced cuts in parallel planes at an oblique angle to the surface of the sheet; severing each strip in two parts by a diagonal cut across -its end which intersects each side edge substantially at a corner; and dividing each wedge strip thus obtained into wed e lifts by severing it widthwise at interva s.

8. The method of making wedge lifts from sheet heel-stock which comprises dividing the sheet in strips by a series of spaced cuts in parallel planes at an oblique angle to the surface of the sheet; severing each strip in two parts by a diagonal cut across its end which intersects each side edge substantially at a corner; and dividing each wedge strip thus obtained into wedge lifts by severing 1t widthwise, at intervals, by a cutting stroke in a plane normal to the surface of the strip. 7

9. The method of making wedge stri s for use in the production of wedge li ts which comprises dividing sheet heel-stock in strips by a series of cuts in parallel planes at an oblique angle to the surface of the said lifts.

' FRED V. HART.

It is hereby certified that in Letters Patent No. 1,361,053, granted December 7 1920, upon the application of Fred V. Hart, of Lynn, Massachusetts, for an improvement in Methods of Making Heels, errors appear in the orinted specification requiring correction as follows: Page 2, line 75, for the Word carying read varying; page 3, line 19, for the article the read than; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 4th day of January, A. D., 1921.

[SEAL.] L. B. MANN,

Acting Commissioner of Patents, 

